This question already has answers here:
How to achieve method chaining in Java?
(4 answers)
Closed 3 years ago.
For example how do I do this?
getServer().getManager().registerNewUser(arguments);
and
getServer().getStats().user(arguments);
Stuff like this, I've tried searching the web but I cant find any tutorials on this,so I'm asking here.
In OOP, in general, this concept is called class composition more on this you can find it here https://en.wikipedia.org/wiki/Object_composition
Also for java and the difference between Composition and inheritance https://www.baeldung.com/java-inheritance-composition
Related
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Understanding annotation in Java
(3 answers)
What do annotations do? And how do I use it? [duplicate]
(2 answers)
Closed 7 months ago.
The community reviewed whether to reopen this question 7 months ago and left it closed:
Original close reason(s) were not resolved
I mean I know that it provides metadata and special instructions to the compiler but where is the logic for that? How are two annotations different if both of them has same body? The source code for #Id, #Override and #Embeddable is same but how do they work differently when they don't have any code in them. Also, if we can't see the code/logic then how can I create my own annotation with specific functionality?
This question already has answers here:
Difference between object and instance
(15 answers)
The difference between Classes, Objects, and Instances
(16 answers)
What is the difference between object and instance?
(10 answers)
Closed 3 years ago.
Is instance and object same thing in OOP or not?
A good explanation Here. But some explanation is so confusing.
I want to know best explanation. Advance thanks .
This question already has answers here:
Class or variable not found
(2 answers)
Should Javadoc comments be added to the implementation?
(7 answers)
Closed 5 years ago.
I'm creating the javadoc of my project, but i'm not sure where should i write it.
I have all the javaDoc implemented in my interfaces. And I have classes implementing these interfaces (and not adding extra-methods). So, Is there any command to copy the javadoc from the interfaces to my classes? Or should i Copy-paste from my interfaces to the implementation?
This question already has answers here:
When should one use interfaces?
(19 answers)
Closed 5 years ago.
I'm having trouble understanding why I should use interfaces, and how I should integrate them into my current project. I use a lot of polymorphism already, and I usually see polymorphism and interfaces side by side in other projects of my peers.
Why do you use interfaces? What are the real benefits?
This question has already been answered in:
When should one use interfaces?
What is an interface in Java?
Java Interfaces?
To get more information about OOP design you can also refer to books like Head First: Object oriented analysis and design. There are also some on-line courses on platforms like Coursera and Edx that you can use.
This question already has answers here:
Where can I find the Java JDK source code? [closed]
(11 answers)
Closed 6 years ago.
In java, is there any way to access the methods to classes that already you import? For example, is there a way to view the code for all the methods used for arrays? Such as the constructors, add(), remove(), size()? I have checked oracle, but there is no code, only method names and parameters. I understand how the methods work, but i'd like to see the actual code used.
Search for the JDK source code, depending on the version you want.